<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Vue基础呀</title>
  </head>

  <body>
    <div id="app">
      <p v-if="isShow" > hello 呀呀呀</p>
      <p v-show="isShow" > hello 呀呀呀</p>
      <input type="button" @click="changeIsShow" value="切换显示状态">
      <h2 v-if="age<18">是少年人</h2>


    </div>
    

    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>


    <script>
      new Vue({
        el: "#app",
        data: {
          isShow: true,
          age: 17
        },
        methods: {
          changeIsShow:function(){
            this.isShow = !this.isShow;
          }
        
        },

      })
    </script>

    <!-- data是这个Vue实例中使用到的数据。用什么就写什么 -->
  </body>
</html>
